From 111b0cdb97d44cfe5dec1338a78ba8aff65c32e2 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 9 Jun 2017 15:11:58 +0200 Subject: ALSA: seq: Allow the modular sequencer registration Many drivers bind the sequencer stuff in off-load by another driver module, so that it's loaded only on demand. In the current code, this mechanism doesn't work when the driver is built-in while the sequencer is module. We check with IS_REACHABLE() and enable only when the sequencer is in the same level of build. However, this is basically a overshoot. The binder code (snd-seq-device) is an individual module from the sequencer core (snd-seq), and we just have to make the former a built-in while keeping the latter a module for allowing the scenario like the above. This patch achieves that by rewriting Kconfig slightly. Now, a driver that provides the manual sequencer device binding should select CONFIG_SND_SEQ_DEVICE in a way as select SND_SEQ_DEVICE if SND_SEQUENCER != n Note that the "!=n" is needed here to avoid the influence of the sequencer core is module while the driver is built-in. Also, since rawmidi.o may be linked with snd_seq_device.o when built-in, we have to shuffle the code to make the linker happy. (the kernel linker isn't smart enough yet to handle such a case.) That is, snd_seq_device.c is moved to sound/core from sound/core/seq, as well as Makefile. Last but not least, the patch replaces the code using IS_REACHABLE() with IS_ENABLED(), since now the condition meets always when enabled. Signed-off-by: Takashi Iwai --- sound/core/Makefile | 2 ++ 1 file changed, 2 insertions(+) (limited to 'sound/core/Makefile') diff --git a/sound/core/Makefile b/sound/core/Makefile index a8514b313a89..e2066e2ef9f8 100644 --- a/sound/core/Makefile +++ b/sound/core/Makefile @@ -31,6 +31,7 @@ snd-timer-objs := timer.o snd-hrtimer-objs := hrtimer.o snd-rtctimer-objs := rtctimer.o snd-hwdep-objs := hwdep.o +snd-seq-device-objs := seq_device.o snd-compress-objs := compress_offload.o @@ -40,6 +41,7 @@ obj-$(CONFIG_SND_TIMER) += snd-timer.o obj-$(CONFIG_SND_HRTIMER) += snd-hrtimer.o obj-$(CONFIG_SND_PCM) += snd-pcm.o obj-$(CONFIG_SND_DMAENGINE_PCM) += snd-pcm-dmaengine.o +obj-$(CONFIG_SND_SEQ_DEVICE) += snd-seq-device.o obj-$(CONFIG_SND_RAWMIDI) += snd-rawmidi.o obj-$(CONFIG_SND_OSSEMUL) += oss/ -- cgit v1.2.3